That's really lame...All you don't have to do is touch the circle pad....you can do that either way and its not that big of a deal...
You also lose time not being on the route since you can't just zip in, dump/release the babies and get new ones then and there.
While its simple, its not more efficient than staying on 6 and repeatedly zipping across the route between the cave and city since you have to fly to the city, wheel yourself across to the daycare, then fly to Lumoise to set up that gimmick.
Cute, but not really that great a method.